A very basic but functional model for adding corner shelves in places where you need them.

The model is designed to be glued to walls, in most cases silicone adhesives will be a good solution.

If you will want to remove the model without breaking it, use string to cut the silicone.

Manual slicing:

1. Import frame
2. Add Insert as a part of the frame model
3. Change insert top/bottom layers to 0
4. Adjust infill according to your liking
5. Recommendation: Increase sparse infill width to make it stronger